Jonathan Cheban has threatened to quit Celebrity Big Brother, admitting that he is feeling ‘claustrophobic’ and is worried for his ‘mental stability’.

The American reality star and Kim Kardashian’s BFF was seen entering the diary room on Saturday night’s show.

‘I’m not feeling so great at this point,’ he revealed.

‘Right now I’m feeling edgy and claustrophobic… there is a point where my mental stability is more important than entertaining.’

Jonathan, who has quickly found himself one of the most loved contestants on this year’s show added: ‘Right now I’m definitely a bit torn on whether to stay in the house anymore, I’ve reached a point where I don’t know if I want to stay anymore.’

(Picture: Twitter)

He visited the diary room several times throughout the episode and later demanded to speak to the producers.

‘I need to get out of here,’ he told them.

‘It’s becoming impossible. I can’t even sit. I can’t even enjoy it. I can’t even hear anybody, I’m so anxious I feel I’m going to have a heart attack.’

Channel 5 told Metro.co.uk: ‘The welfare of all housemates is a priority to Big Brother and all housemates are continuously monitored at all times.’

Saturday night’s show saw Jonathan getting closer with Gemma Collins, as the former The Only Way Is Essex star asked for fashion advice.

Gemma and Jonathan. Picture: REX

‘Do you think you should be wearing pink?’ he asked, before Gemma explained that pink makes her happy.

But after modelling several other outfits, Jonathan concluded: ‘Don’t ever wear that again, it looks like a Mexican hit a car on his way to a fiesta.